The Sierra Club, the National Parks Conservation Association, and the Natural Resources Defense Council filed a brief against the Environmental Protection Agency in the U.S. Court of Appeals for the District of Columbia Circuit on September 23, asking the court to vacate recent agency actions in response to a court ruling. The groups said the agency, which released a memorandum on how to respond to a Cross State Air Pollution Rule decision, put out a final agency action without a comment period. The court had vacated the rule in August 2012. The agency has until November 22 to reply.